macviews: honor system control tint setting

ui/views/cocoa/views_nswindow_delegate.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_COCOA_VIEWS_NSWINDOW_DELEGATE_H_
 #define UI_VIEWS_COCOA_VIEWS_NSWINDOW_DELEGATE_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
@@ skipping 24 matching lines @@
 // Initialize with the given |parent|.
 - (id)initWithBridgedNativeWidget:(views::BridgedNativeWidget*)parent;
 
 // Notify that the window has been reordered in (or removed from) the window
 // server's screen list. This is a substitute for -[NSWindowDelegate
 // windowDidExpose:], which is only sent for nonretained windows (those without
 // a backing store). |notification| is optional and can be set when redirecting
 // a notification such as NSApplicationDidHideNotification.
 - (void)onWindowOrderChanged:(NSNotification*)notification;
 
+// Notify that the system control tint changed.
+- (void)onSystemControlTintChanged:(NSNotification*)notification;
+
 // Called on the delegate of a modal sheet when its modal session ends.
 - (void)sheetDidEnd:(NSWindow*)sheet
          returnCode:(NSInteger)returnCode
         contextInfo:(void*)contextInfo;
 
 // Redeclare methods defined in the protocol NSWindowDelegate which are only
 // available on OSX 10.7+.
 - (void)windowDidFailToEnterFullScreen:(NSWindow*)window;
 - (void)windowDidFailToExitFullScreen:(NSWindow*)window;
 
 // Called when the application receives a mouse-down, but before the event
 // is processed by NSWindows. Returns NO if the event should be processed as-is,
 // or YES if the event should be reposted to handle window dragging. Events are
 // reposted at the CGSessionEventTap level because window dragging happens there
 // before the application receives the event.
 - (BOOL)shouldRepostPendingLeftMouseDown:(NSPoint)locationInWindow;
 
 @end
 
 #endif  // UI_VIEWS_COCOA_VIEWS_NSWINDOW_DELEGATE_H_